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xfs: remove block number from inode lookup code

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The block number comes from bulkstat based inode lookups to shortcut
the mapping calculations. We ar enot able to trust anything from
bulkstat, so drop the block number as well so that the correct
lookups and mappings are always done.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Dave Chinner 2010-06-24 11:35:17 +10:00 • committed by Dave Chinner
parent 1920779e67
commit 7b6259e7a8
15 changed files with 26 additions and 59 deletions
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16
fs/xfs/xfs_ialloc.c
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@ -1354,22 +1354,6 @@ xfs_imap(
return 0;
}
/*
* If we get a block number passed we can use it to
* find the buffer easily.
*/
if (imap->im_blkno) {
offset = XFS_INO_TO_OFFSET(mp, ino);
ASSERT(offset < mp->m_sb.sb_inopblock);
cluster_agbno = xfs_daddr_to_agbno(mp, imap->im_blkno);
offset += (agbno - cluster_agbno) * mp->m_sb.sb_inopblock;
imap->im_len = XFS_FSB_TO_BB(mp, blks_per_cluster);
imap->im_boffset = (ushort)(offset << mp->m_sb.sb_inodelog);
return 0;
}
/*
* If the inode chunks are aligned then use simple maths to
* find the location. Otherwise we have to do a btree